Uninterruptible Power Supply

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Uninterruptible Power Supply

(hardware)

(UPS) A battery powered power supply unit that is
guaranteed to provide power to a computer in the event of
interruptions in the incoming mains electrical power.
Different rating UPSs will provide power for different lengths
of time.

Modern UPSs connect to the computer's serial port and
provide information such as battery time remaining, allowing
the computer to shut down gracefully before complete loss of
power.

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